Tubular drying apparatus.



PATENTED SEPT. 27, 1904.

M. SALZMANN. TUBULAR DRYING APPARATUS.

APPLICATION FILED JULY 18, 1903.

3 SHEETS-SHEET 1 N0 MODEL.

- i iN\/E TD WTDFKNE Si WITN ES 5E5 PATENTED SEPT. 27, 1904 M. SALZMANN.

TUBULAR DRYING APPARATUS.

APPLICATION FILED JULY 18, 1903.

3 SHEETS-SHEET N0 MODEL.

WITN 5555 ,IVENTEJR PATENTED SEPT. 27, 1904.

M. SALZMANN. TUBULAR DRYING APPARATUS.

APPLICATION FILED JULY 18, 1903.

3 SHEETS-SHEET 3.

NO MODEL.

WITNESSES d n Mm UNTTED 4 STATES Patented September 2'7, 1904.

PATENT OFFICE.

TUBULAR DRYING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 770,823, datedSeptember 27, 1904:.

Application filed July 18, 1903. Serial No. 166,144. (No model.)

To all whmn, it may concern.-

Be it known that I, MAX SALZMANN, manager, a subject of the King ofPrussia, Emperor of Germany, residing at 82 and 83 Schenebeckerstrasse,Magdeburg-Buckau, Prussia, Germany, have invented a new and usefulTubular Drying Apparatus; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

In the manufacture of fuel and other briquets it is usual to employ araw material which is more or less damp and accordingly unfit for useuntil properly dried. This has been accomplished by the use of dryingapparatus; but it is found that the loose dust and the smaller particlesdry more rapidly than the larger particles or granules. Accordingly itis customary to separate the dust and loose particles out of the mixtureafter partly drying the same and then subject the remaining granules andlarger particles to a second drying operation.

The present invention relates to a tubular drying apparatus, which is soconstructed that the aforesaid method can be carried out continuously ina single apparatus, whereas it was formerly necessary after the materialhad passed once through the apparatus to separate dust and granules andthen to pass the latter again through the same or another apparatus.

My invention consists, substantially, in the construction, combination,location, and arrangement of parts, all as will be more fullyhereinafter set forth, as shown in the accompanying drawings, andfinally pointed out in the appended claims.

In the accompanying drawings, Figure 1 is a longitudinal verticalsection through a tubular drying apparatus made according to thisinvention. Figs. 2 and 3 are like sections showing modifications, thoseparts which are of the same construction as that shown in Fig. 1 havingbeen cut away. Fig. 4 is an end elevation, and Fig. 5 a side elevation,partly in section, of the end of the apparatus, having fitted to it aspecial feeding device.

receptacle with a plurality of longitudinally arranged tubes orpassages, andIhave shown a convenient form of this arrangement in whichthe casing C is provided with a plurality of tubes a and b, which extendinward from the ends of the casing or receptacle.

Reference-sign 0 designates a chamberintermediate the respective seriesof tubes a and 6, and the material from the tubes a is delivered intothis chamber previous to its passage into the tubes 5. tively constituteseparate drying devices for the material, and for this purpose I preferto employ some means for heating these respective series of tubes. Ihave shown a convenient arrangement for this purpose, to which, however,I do not desire to be limited or restricted, in which the tubes orpassages a and The tubes a and b respecb are arranged in steam-tightdrums or heaters at each end of the casing or receptacle, and I providemeans by which steam is admitted into the respective drums for thepurpose of heating the same, together with tubes a and 6, to anyrequired degree of temperature.

Reference-sign c designates the inlet-pipe for the steam supplied to thedrum surrounding the tubes or passages a, and Ihave shown an arrangementby which the steam is supplied from the stationary pipe into therotating casing. For this purpose the inlet-pipe e is connected to asleeve or bushing upon one trunnion of the receptacle or casing. Thissleeve or bushing is made steam-tight upon the trunnion by any suitableor convenient packing, and steam is admitted into the casing through thepipe f. An intermediate tubular shell g is sometimes provided for thepurpose'of more convenient construction; but in this case suitableopenings should be made therein in order to allow the steam to pass intothe outer-casing and surround the tubes or passages a.

Reference-sign s designates an additional steam-pipe, through whichsteam is admitted into the pipe t, which forms a part of and rotateswith'the main casing or receptacle (J. The pipe 8 is mounted on the samesleeve or bushing as the pipe 6 and is connected in steam-tight relationwith the said pipe 6 by any suitable stuffing-box or packing. The pipetleads into the chamber surrounding the pipes Z, so that the pipes Z areheated froma separate source of steam-supply than the pipe a. Thisallows for the employment of steam of different pressure in the twochambers, so that one may be heated to a greater extent than the other,if desired. Reference-signs u and w'respectively designate drain-pipesextending from the respective steam-chambers and which lead intoseparate cavities o and 3 in the lower trunnion of the main casing orreceptacle C. These cavities respectively communicate with stationarydischarge-pipes w and e, which are mounted in a sleeve or bushing uponthe lower trunnion in a manner similar to the pipes e and s. The pipes wand 2 may be connected to any, suitable condensers or steamtraps inorder to drainofl? the water in the steam-chambers. It will be observedthat the water from the condensedsteam is enabled to drain into thepipes u and w by reason of the rotation of the casing O, acting toremove a certain amount of water at each revolution thereof.Reference-sign d designates a hopper from which the material is led tothe upper end of the rotary casing C. From this hopper the materialpasses into the tubes or passages a and gravitates helicallytherethrough by reason of the rotation of casing C until the materialfinally drops into the intermediate chamher 0.

, comminute the material remaining in thechamher 0, I employ a roller n,carried in a frame 0, suspended from a ball or rollerp in a raceway q.This is a convenient construction, for the reason that it permits theroller to act upon the material in the chamber 0, the roller or ball 2moving around the raceway q for this purpose.

Reference sign on designates an annular trough into which the comminutedmaterial passes and from which it presently drops into troughs r,arranged on the face of the lower steam drum or casing. The materialgravitates through the tubes or passages Z in a man- .ner similar to theaction of the tubes a and finally drops into the discharge-trough Z,from which it passes out of the machine, together with the material from.the trough 7c, of which I have already spoken. v

The operation of the above-described apparatus will be understood fromthe preceding description. The damp and mixed material is first fed inat the hopper 0Z, from which it passes into the drying-tubes a. Here itis subjected to the drying action of the steam in the surroundingchamber, so that when the material finally dropsinto the chamber 0 theloose or finer particles are sufficiently and properly dried. At thispoint the sieve or perforated plate 2' comes into action and separatesout such loose or finer particles, which at once drop into the trough Z0and thence into the discharge-trough Z and pass out of the machine. Theremaining materialthat is to say, the coarser particles or granulesisfirst disintegrated or comminuted by the roller n and then passing intothe tubes Z is subjected to the action of the second heating-chamber andadditionally dried until it also drops into the discharge-trough Z andout of the machine. It will be seen that the operation is entirelyautomatic and that each particle of the raw material, whether coarse orfine, is dried to the proper degree-and only to such degree at the timeof its discharge from the machine. While I have referred to the chamberssurrounding the tubes a and Z as steam-chamhers, it is obvious that theymay be heated by air-currents or waste, gases or products of combustionor heated currents of water or other liquid or by any circulatingmedium.

In Fig. 2 I have illustrated a slight modification, in which a number ofballs 3 are employed for the purpose of comminuting or disintegratingthe coarser material or granules in the chamber 0, and these balls arearranged to roll around the casing in araceway formed by the casting m.In order to permit the escape of the material acted upon by the balls 3,I provide a series of openings or passages 4: in the frame or casting mand through which the comminuted material passes in order to enter thetubes Z. In Fig. 3 I have illustrated a still further modification, inwhich the tubes Z practically form a continuation of the tubes a. poseaseries of perforated tubes 5 are provided in the chamber 0 and whichconnect the ends of the tubes a and Z. This construction is adapted tothe treatment of material in For this purwhich it is not necessary toprovide comminuting or disintegrating means to act after the preliminarydrying operation. In this case the fine, loose, or dried particles passthrough the openings in the tubes 5 and thence drop into the trough 7ain the same manner as above described.

In some cases it is desirable to provide means by which the raw materialis positively fed into the apparatus. I have shown a convenientarrangement for this purpose in Figs. 4 and 5, in which 8 designates arotary feed wheel or disk having a series of inclined blades which actupon the material to force, crowd, or push the same into the tubes a ofthe rev-' oluble casing or receptacle. The feed-disk 8 may be driven byany suitable or convenient means, and I have shown an arrangement bywhich it is connected to the main driveshaft of the apparatus. Numeral 6designates a large worm-wheel upon the casing or receptacle C, which maybe employed in connection With any suitable Worm-Wheel to drive thedevice. Numeral 7 designates a pinion formed to mesh with the teeth ofthe worm 6, and any suitable sprocket-chain connection may be employedto drive the feed-disk 8 from the pinion 7.

It is obvious that many variations and changes in the details ofconstruction would readily occur to any one skilled in the art and stillfall within the spirit and scope of my invention. I do not, therefore,desire to be limited or restricted to the exact details shown anddescribed; but,

Having now set forth the object and nature of my invention, and aconstruction embodying the principles thereof, what I claim as new anduseful and of my own invention, and desire to secure by Letters Patent,is

1. In a drying apparatus, a revoluble casing or receptacle, a pluralityof passages therein, means for heating the passages, and a plurality ofopenings arranged to constitute a sieve at an intermediate point of thesaid passages, as and for the purpose set forth.

2. In a drying apparatus, a revoluble casing or receptac1e,a series ofinlet-passages therein, a series of outlet-passages in the said casing,and means for heating said inlet and outlet passages, and meansintermediate said inlet and outlet passages arranged to constitute asieve, and into contact with which the material is led, asand for thepurpose set forth.

3. In a drying apparatus, a revoluble casing or receptacle, a series oflongitudinal passages therein, means for delivering material into saidpassages, a second series of passages, means for heating said series,and an intermediate chamber having means therein to constitute a sieve,as and for the purpose set fort 4. In a drying apparatus, a revolublecasing or receptacle, a series of passages therein, means deliveringinto said passages, a second series of passages, means for heating saidpassages, and an intermediate chamber having a perforated peripheralportion, into contact with which the material is led, as and for thepurpose set forth.

5. In a drying apparatus, a revoluble casing or receptacle, a series ofpassages therein, a second series of passages, means for heating saidpassages, an intermediate chamber having a perforated peripheral wall,and means Within said chamber for comminuting the material, as and forthe purpose set forth.

6. In a drying apparatus, a revoluble casing or receptacle, 2. series ofpassages therein, a second series of passages, and mean-s intermediatesaid series constituting a sieve, and receptacles surrounding saidpassages and arranged to contain a circulatory medium, as and for thepurpose set forth.

7. In a drying apparatus, a revoluble casing or receptacle, a series ofpassages therein, a second series of passages, an intermediate chamberhaving a perforated wall, and steam drums or jackets surrounding saidpassages, as and for the purpose set forth. 1

8. In a drying apparatus, a revoluble casing or receptacle, a series ofpassages therein, a second series of passages, an intermediate chamberhaving a perforated Wall, separate steam drums or jackets surroundingsaid respective series of passages, and separate steam connectionscommunicating with said drums or jackets, as and for the purpose setforth.

9. In a drying apparatus, a revoluble casing or receptacle having aplurality of longitudinally-arranged passages, means interposed betweenthe ends of said passages constituting a sieve, a drum or jacketsurrounding said passages, a supply-tube for said drum or jacket, and aswivel or sleeve connection in said supply-tube whereby the casing maybe rotated, as and for the purpose set forth.

10. In a drying apparatus, a revoluble casing or receptacle, a series ofpassages therein, a second series of passages, intermediate meansconstituting a sieve, a jacket'or drum surrounding said passages, and asupply-pipe swiveled or sleeved therein concentric with the axis ofrotation of the casing, whereby the latter may be rotated, as and forthe purpose set forth.

11. In a drying apparatus, an inclined revoluble casing or receptacle,aplurality of passages therein, means'for supplying material to saidpassages, a steam-jacket surrounding said passages, means for supplyingsteam to said drum or jacket, and a discharge-pipe leading from saiddrum or jacket at a point on the periphery thereof, whereby the water ofcondensation is led away, as and for the purpose set forth.

12. In a drying apparatus, an inclined revoluble casing or receptacle, aseries ofpassages therein, an intermediate chamber constituting a sieve,means for supplying material to said passages, and a steam drum orjacket having inlet connections coaxial with said casing, and anexhaust-pipe extending from a point on its periphery, as and for thepurpose set forth.

13. In a drying apparatus, an inclined revoluble casing or receptacle, aplurality of passages therein, means for supplying material to saidpassages, an intermediate chamber constituting a sieve, and a pair ofsteam-drums having separate inlet connections coaxial with said casing,as and for the purpose set forth.

14. In a drying apparatus, an inclined revoluble casing or receptacle, aplurality of passages therein, means for supplying material to saidpassages, an intermediate chamber having a perforated wall to constitutea sieve, and means in said chamber for comminuting or disintegrating thematerial, as and for the purpose set forth.

15. In a drying apparatus, an inclined revoluble casing or receptacle, aplurality of passages therein, means for supplying material to saidpassages, an intermediate chamber having a perforated wall to constitutea sieve, and a roller disposed in said chamber and arranged to comminuteor disintegrate the material, as and for the purpose set forth.

16. In adrying apparatus, an inclined revoluble casing or receptacle, aseries of passages therein, means for supplying material to saidpassages, a second series of passages, an inlet-chamber having a sieve,means for directing the material into said second series of passages,and means for heating said passages, as and for the purpose set forth.

17. In a drying apparatus, an lnclmed revoluble casing or receptacle, aseries of passages therein, means for supplying the material to saidpassages, an intermedlate chamber constituting a sieve, a roller thereinfor comminuting the material, said roller suspended from a raceway onthe casing, and

' means for heating said passages, as and for the purpose set forth.

18. In a drying apparatus, an inclined revoluble casing or receptacle, aplurality of passages therein, means for supplying material to saidpassages, an intermediate chamber constituting a sieve, means in saidchamber for comminuting or disintegrating the material,

a discharge-trough, and means for leading the I MAX SALZMANN.

Witnesses:

SARAH G. MOKELLIP, J AMES L. A. BURRELL.

